Disable PerfMap generation for Apple mobile platforms (#121237)

## Description

After #121187 Crossgen2 determines
cross-compilation targets by reading
Crossgen2Tool.GetMetadata(MetadataKeys.TargetOS). This code path
triggers PerfMapWriter, which currentl doesn't support iOS targets. This
PR disables PerfMap generation for Apple mobile platforms.

Author: kotlarmilos

src/tasks/Crossgen2Tasks/Microsoft.NET.CrossGen.targets

@@ -24,6 +24,7 @@ Copyright (c) .NET Foundation. All rights reserved.
     <PublishReadyToRunComposite Condition="'$(PublishReadyToRunUseCrossgen2)' != 'true' or '$(SelfContained)' != 'true'">false</PublishReadyToRunComposite>
     <PublishReadyToRunUseRuntimePackOptimizationData Condition="'$(PublishReadyToRunUseRuntimePackOptimizationData)' == ''">true</PublishReadyToRunUseRuntimePackOptimizationData>
     <PublishReadyToRunPerfmapFormatVersion Condition="'$(PublishReadyToRunPerfmapFormatVersion)' == ''">1</PublishReadyToRunPerfmapFormatVersion>
+    <PublishReadyToRunEmitSymbols Condition="'$(TargetOS)' == 'ios' or '$(TargetOS)' == 'iossimulator' or '$(TargetOS)' == 'tvos' or '$(TargetOS)' == 'tvossimulator' or '$(TargetOS)' == 'maccatalyst'">false</PublishReadyToRunEmitSymbols>
   </PropertyGroup>
 
   <!--

src/tasks/Crossgen2Tasks/PrepareForReadyToRunCompilation.cs

@@ -210,7 +210,7 @@ private void ProcessInputFileList(
                     // an input to the ReadyToRunCompiler task
                     TaskItem r2rCompilationEntry = new(file);
                     r2rCompilationEntry.SetMetadata(MetadataKeys.OutputR2RImage, outputR2RImage);
-                    if (outputPDBImage != null && ReadyToRunUseCrossgen2 && !_crossgen2IsVersion5)
+                    if (outputPDBImage != null && ReadyToRunUseCrossgen2 && !_crossgen2IsVersion5 && EmitSymbols)
                     {
                         r2rCompilationEntry.SetMetadata(MetadataKeys.EmitSymbols, "true");
                         r2rCompilationEntry.SetMetadata(MetadataKeys.OutputPDBImage, outputPDBImage);

src/tests/build.proj

@@ -547,7 +547,7 @@
       <CrossgenCmd>$(CrossgenCmd) -m "$(CORE_ROOT)\StandardOptimizationData.mibc"</CrossgenCmd>
 
       <CrossgenCmd Condition="'$(__CreatePdb)' != ''">$(CrossgenCmd) --pdb</CrossgenCmd>
-      <CrossgenCmd Condition="'$(__CreatePerfmap)' != ''">$(CrossgenCmd) --perfmap --perfmap-format-version 1</CrossgenCmd>
+      <CrossgenCmd Condition="'$(__CreatePerfmap)' != '' and '$(TargetsAppleMobile)' != 'true'">$(CrossgenCmd) --perfmap --perfmap-format-version 1</CrossgenCmd>
       <CrossgenCmd Condition="'$(__CompositeBuildMode)' != ''">$(CrossgenCmd) --composite</CrossgenCmd>
       <CrossgenCmd Condition="'$(__CompositeBuildMode)' == ''">$(CrossgenCmd) --crossgen2-parallelism 1</CrossgenCmd>